-6.60(-0.50%)

+1.84(+0.12%)

Apple shares are more than 36 percent off their 52-week high of $705/share, down to $447/share following last week's quarterly earnings miss.

This sharp decline has suddenly made Apple no longer the world's most valuable company.

Perhaps confusingly, this is all happening as Apple posts the biggest profits of any non-oil company ever.

What's happening is: Apple's business, powered by the incredible growth and profitability of the iPhone, has reached a summit, and, while it is still growing, it is growing at a slower pace than it used to.

Since stock prices are a reflection of where Apple is going, not where it is or where it has come from, Apple's stock price is going down.

Naturally, this very-good-and-very-bad moment has sown some turmoil in the ranks of employees at Apple.

Hoping to calm those worries, and rally them for a great 2013, Apple CEO Tim Cook addressed the troops last week.